Could kris be trying to delay the ending?
Could kris be not working with the knight but trying to delay the end of the game as long as possible? Assuming they knocks out the others in the knight boss fight, is it to stop the game from ending by beating the bad guy?
Could they be desotrying codes because entering the shelter singles the end of the game?
Could he be making fountains to add more levels to the games?
If kris was just working for the night wouldn't it have made more sense to keep susie away from the flower shop and let the night open the fountain on there own? The knight dose make another fountain anyway.